The Chamber of Commerce has launched a new ad urging conservatives to support comprehensive immigration reform, featuring the words of three potential 2016 presidential candidates -- Sens. Marco Rubio (R-Fla.), Rep. Paul Ryan (R-Wis.) and Sen. Rand Paul (R-Ky.).

But Paul on Sunday came out against the current bill, saying he will vote against it because it doesn't include his border security proposal. Paul has otherwise said he supports the idea of comprehensive immigration reform, as long as its done right.